2.7 Installing the Edge Transport Server

In order to offer Exchange services, the Edge Transport Server has a local copy of the most significant information of the company's Active Directory. This is stored in a Lightweight Directory Services database, which was formerly known as Active Directory Application Mode or ADAM. This database only stores a subset of the Active Directory information, and only informational items like recipients that exist in the internal Exchange organization. No information is stored that can compromise the company's Active Directory security.